thanks for your interest FD, however I wouldn't call what I have a "collection", more like an odd selection of plants I've acquired from friends over many years. So I am just dipping my toe in the water here to see if I can "educate" myself
I live adjacent to a large forestry reserve, so get to enjoy seeing & photographing many endemic orchids:
Geodorum densiflorum
Caladenia carnea (which has apparently had a name change to Petalochilus carnea)
Erythrorchis cassythoides
Dipodium variegatum
D. speciosum
D. kingianum now Thelychiton kingianus
Some of those in my "collection" that I've managed to identify so far are:
Aerides odorata
Phaius tancarvilleae
Spathoglottis plicata (paulinae)
Thunia marshalliana
still waiting for others to flower, so I can get an idea what they might be